Charging method, charging adapter and charging system

ABSTRACT

The present disclosure provides a charging method, a charging adapter and a charging system. The charging adapter includes a second controller and an adjusting circuit including a current detection circuit. The second controller is configured to receive a voltage value of a cell, search a threshold range table to obtain a current adjusting instruction. The current detection circuit is configured to detect a current value of a power signal outputted by the adjusting circuit. The second controller is further configured to calculate a difference between the current value detected and a current value specified by the current adjusting instruction, and send a calibration instruction to the adjusting circuit when an absolute value of the difference calculated is greater than a difference threshold. The adjusting circuit is configured to calibrate the power signal according to a current difference specified by the calibration instruction, and output a calibrated power signal.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.15/596,985, filed on May 16, 2017, which is a continuation of U.S.application Ser. No. 15/114,952 filed on Jul. 28, 2016, which is a U.S.national phase application based on International Application No.PCT/CN2014/077150, filed on May 9, 2014, which claims priority toChinese Patent Application No. 201410042717.2, filed on Jan. 28, 2014,the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure generally relates to mobile terminal field, andmore particularly, to a charging method and system.

BACKGROUND

With the progress of the times, the internet and mobile communicationnetwork provide massive functions and applications. A user not only canuse a mobile terminal to perform conventional applications, such as usea smart phone to answer a call or call somebody up, but also can use themobile terminal to browse a webpage, transmit a picture or play a gameand so on.

DISCLOSURE

A charging method provided in the present disclosure is applied in acharging adapter. The charging adapter includes a second controller andan adjusting circuit. The adjusting circuit includes a current detectioncircuit. The charging method includes: with the second controller,receiving a voltage value of a cell; searching a threshold range tableto obtain a current adjusting instruction matched with a threshold rangecontaining the voltage value of the cell, and sending the currentadjusting instruction to the adjusting circuit, the threshold rangetable recording one or more threshold ranges and one or more currentadjusting instructions having a one-to-one mapping relation with the oneor more threshold ranges; with the current detection circuit, detectinga current value of a power signal outputted by the adjusting circuit,and sending the current value detected to the second controller; withthe second controller, calculating a difference between the currentvalue detected and a current value specified by the current adjustinginstruction, and sending a calibration instruction to the adjustingcircuit when an absolute value of the difference calculated is greaterthan a difference threshold; and with the adjusting circuit, calibratingthe power signal according to a current difference specified by thecalibration instruction, and outputting a calibrated power signal, inwhich a current value of the calibrated power signal is equal to thecurrent value specified by the current adjusting instruction.

A charging adapter provided in the present disclosure includes secondcontroller and an adjusting circuit. The second controller is configuredto receive a voltage value of a cell, search a threshold range table toobtain a current adjusting instruction matched with a threshold rangecontaining the voltage value of the cell, and send the current adjustinginstruction to the adjusting circuit. The threshold range table recordsone or more threshold ranges and one or more current adjustinginstructions having a one-to-one mapping relation with the one or morethreshold ranges. The adjusting circuit includes a current detectioncircuit. The current detection circuit is configured to detect a currentvalue of a power signal outputted by the adjusting circuit, and send thecurrent value detected to the second controller. The second controlleris further configured to calculate a difference between the currentvalue detected and a current value specified by the current adjustinginstruction, and send a calibration instruction to the adjusting circuitwhen an absolute value of the difference calculated is greater than adifference threshold. The adjusting circuit is configured to calibratethe power signal according to a current difference specified by thecalibration instruction, and output a calibrated power signal, in whicha current value of the calibrated power signal is equal to the currentvalue specified by the current adjusting instruction.

A charging system provided in the present disclosure includes a chargingadapter and a mobile terminal. The charging adapter includes a secondcontroller and an adjusting circuit. The mobile terminal includes a celldetection circuit and a cell. The cell detection circuit is configuredto acquire a voltage value of the cell, and to send the voltage value ofthe cell to the second controller. The second controller is configuredto search a threshold range table for a current adjusting instructionmatched with a threshold range containing the voltage value of the cell,and to send the current adjusting instruction to the adjusting circuit,in which the threshold range table records one or more threshold rangesand current adjusting instructions having a mapping relation with theone or more threshold ranges. The current detection circuit isconfigured to detect a current value of a power signal outputted by theadjusting circuit, and to send the current value detected to the secondcontroller. The second controller is further configured to calculate adifference between the current value detected and a current valuespecified by the current adjusting instruction, and to send acalibration instruction to the adjusting circuit if an absolute value ofthe difference calculated is greater than a difference threshold. Theadjusting circuit is configured to perform a current adjustmentaccording to the current adjusting instruction, and to output a powersignal after the current adjustment.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the technical solutions of embodiments of the presentinvention more clearly, the accompanying drawings used in thedescription of embodiments of the present invention are brieflydescribed hereunder. Obviously, the described drawings are merely someembodiments of present invention. For persons skilled in the art, otherdrawings can be obtained based on these drawings without any creativework.

FIG. 1 is a first flow chart showing a charging method provided by anembodiment of the present disclosure.

FIG. 2 is a specific flow chart showing step S3 in a charging methodprovided by an embodiment of the present disclosure.

FIG. 3 is a second flow chart showing a charging method provided by anembodiment of the present disclosure.

FIG. 4 is a first block diagram showing a charging system provided by anembodiment of the present disclosure.

FIG. 5 is a second block diagram showing a charging system provided byan embodiment of the prevent disclosure.

FIG. 6 is a third block diagram showing a charging system provided by anembodiment of the present disclosure.

FIG. 7 is a fourth block diagram showing a charging system provided byan embodiment of the present disclosure.

FIG. 8 is a fifth block diagram showing a charging system provided by anembodiment of the present disclosure.

DETAILED DESCRIPTION

To make the objectives, the technical solutions, and the advantages ofthe present invention clearer, the technical solutions in embodiments ofthe present invention are hereinafter described clearly and completelywith reference to the accompanying drawings in embodiments of thepresent invention. It should be understood that, the specificembodiments described herein are merely used for explanation, but notused to limit the present disclosure. For illustrating the technicalsolutions of the present invention, specific embodiments are hereinafterdescribed.

It should be noted that, “first” in “first charging interface”, “firstpower line”, “first ground line” and “first controller” is used hereinfor purposes of description, “second” in “second charging interface”,“second power line”, “second ground line” and “second controller” isalso used herein for purposes of description.

It should be noted that, a charging adapter in embodiments of thepresent disclosure includes a terminal capable of outputting a powersignal to charge a cell (a cell of a mobile terminal), such as a poweradapter, a charger, an IPAD and a smart phone.

With an increasing usage frequency of a mobile terminal, it is requiredto charge the mobile terminal frequently. Further, with a user'srequirement on charging speed, some mobile terminals do not monitor acharging current and can accept a bigger charging current (for example,the charging current is 2 A). At the same time, there are some chargingadapters with which a charging with bigger current can be performedstability. However, although a charging time is reduced to some extents,a constant current charging with bigger current can bring safety risks.For example, a cell and a charging circuit in the mobile terminal can bedamaged or even a fire is caused due to a continuous charging withbigger current, if a charging adapter is not disconnected from themobile terminal in time when electric quantity in the cell is full.

It should be noted that, when a charging adapter charges a cell of amobile terminal, an impedance (such as, an internal resistance, aparasitic resistance, and coupling resistance, etc.) besides resistancein the charging circuit would be introduced into a charging loop(including a charging circuit in the mobile terminal and a chargingcircuit in the charging adapter), the introduced impedance can reducethe charging current for directly charging the cell (for example, thecharging current outputted from the charging adapter is 3 A, and thecharging current finally flowing into the cell will be 2.4 A when thecell is charged by the charging loop with the introduced impedance). Itcan be seen that, the introduced impedance can waste electric power,resulting in a huge amount of thermal-power consumption.

FIG. 1 is a first flow chart showing a charging method provided by anembodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

The charging method provided by an embodiment of the present disclosureis applied in a charging system including a charging adapter and amobile terminal. The charging method includes the following steps.

In step S1, a cell detection circuit acquires a voltage value of a cell,and sends the voltage value of the cell to a second controller. Thecharging adapter includes the second controller; the mobile terminalincludes the cell detection circuit and the cell.

In step S2, the second controller searches a threshold range table for acurrent adjusting instruction matched with a threshold range containingthe voltage value of the cell, and sends the current adjustinginstruction to an adjusting circuit. The charging adapter includes theadjusting circuit. The threshold range table records one or morethreshold ranges and one or more current adjusting instructions having aone-to-one mapping relation with the one or more threshold ranges.

In step S3, the adjusting circuit performs a current adjustmentaccording to the current adjusting instruction, and outputs a powersignal after the current adjustment.

Specifically, in this embodiment, when a first charging interface of themobile terminal is insertion-connected to a second charging interface ofthe charging adapter, the charging adapter can charge the cell of themobile terminal. In order to reduce the charging time and to protect thecell and the charging circuit, in normal conditions, the cell can becharged with large current by changing an electric component capable ofsupporting large current (a charging current which is 3 A or higher than3 A) or choosing a charging circuit capable of supporting large current(including the charging circuit in the charging adapter (such as, arectifier and filter circuit and a voltage and current adjustingcircuit), and further including a voltage-dropping circuit in the mobileterminal). However, if the cell of the mobile terminal is charged withconstant large current, more thermal-power consumption can be generated(i.e., a huge amount of heat can be produced), since an impedance (suchas, an internal resistance, a parasitic resistance, and couplingresistance, etc.) besides resistance in the charging circuit would beintroduced into the charging loop (including the charging circuit in themobile terminal and the charging circuit in the charging adapter).

In this embodiment, in order to reduce the thermal-power consumption andto perform an overcharge protection on the cell while it is ensured thata charging can be performed with large current, the cell detectioncircuit of the charging adapter acquires the voltage value of the cellin real time, and sends the voltage value of the cell to the secondcontroller in real time, such that the second controller adjusts thepower signal outputted from the charging adapter in real time.

It should be noted that, a threshold range table is stored in the secondcontroller. The threshold range table can be preset according to acorresponding control requirement to be performed based on the chargingtime and charging current required for charging the cell. In at leastone embodiment, after being edited by a terminal with an edit function,the threshold range table is downloaded to the second controller.

In addition, the threshold range table records one or more thresholdranges, each of which (being a value range) contains an upper limit anda lower limit for the voltage value. Meanwhile, the threshold rangetable further records one or more current adjusting instructions, inwhich each current adjusting instruction corresponds to one thresholdrange. In a specific embodiment of the present disclosure, if thevoltage value of the cell detected is in a range of 0V-4.3V, thecharging adapter outputs a power signal of 4 A to charge the cell. Ifthe voltage value of the cell detected is in a range of 4.3V-4.32V, thecharging adapter outputs a power signal of 3 A to charge the cell. Ifthe voltage value of the cell detected is in a range of 4.32V-4.35V, thecharging adapter outputs a power signal of 2 A to charge the cell. Ifthe voltage value of the cell detected exceeds 4.35V, the chargingadapter just outputs a power signal of several hundred mA to charge thecell. In this way, the overcharging of the cell is avoided, and also thecharging time is reduced. In at least one embodiment, the voltagethreshold range consisting of all threshold ranges recorded in thethreshold range table is continuous in value. In this way, it can beensured that a corresponding current adjusting instruction can be foundfor each voltage value detected (the voltage value of the cell).

Moreover, if the received voltage value of the cell jumps from onethreshold range to another threshold range, the second controller cansend a current adjusting instruction matched with the other thresholdrange to the adjusting circuit.

When the current adjusting instruction is received, the adjustingcircuit adjusts the power signal outputted from the charging adapter,and a current value of an adjusted power signal is equal to a currentvalue specified by the current adjusting instruction.

In another embodiment of the present disclosure, since an impedance(such as, an internal resistance, a parasitic resistance, and couplingresistance, etc.) besides the resistance in the charging circuit wouldbe introduced into a charging loop (including a charging circuit in themobile terminal and a charging circuit in the charging adapter), and theintroduced impedance can consume a part of charging current (this partof charging current would not flow into the cell of the mobileterminal), it is required to take account of this part of chargingcurrent consumed by the introduced impedance, and to make the currentvalue specified by the current adjusting instruction greater than thecurrent value of the power signal entering the cell, so as to ensurethat the current value directly flowing into the cell reaches a presetcurrent value. In at least one embodiment, the current value specifiedby the current adjusting instruction is equal to a sum of the presentcurrent value directly flowing into the cell and the current value ofthe part of charging current consumed by the introduced impedance. Forexample, if it is expected that the current value of the power signalentering the cell is 3 A and the current value of the part of chargingcurrent consumed by the introduced impedance is 0.8 A, the current valuespecified by the current adjusting instruction (i.e., the current valueof the power signal outputted from the charging adapter) is set to 4 A.

FIG. 2 is a specific flow chart showing step S3 in a charging methodprovided by an embodiment of the present disclosure. For illustrationpurposes, only parts related to embodiments of the present disclosureare shown, which will be described in detail in the following.

In another embodiment of the present disclosure, in order to ensure thatthe power signal outputted from the adjusting circuit has large current,it is required to monitor in real time whether the current value of thepower signal outputted from the charging adapter is equal to the currentvalue specified by the current adjusting instruction. The adjustingcircuit includes a current detection circuit.

In this case, performing by the adjusting circuit a current adjustmentaccording to the current adjusting instruction and outputting the powersignal after the current adjustment specifically includes the flowingsteps.

In step S31, the current detection circuit detects a current value ofthe power signal outputted by the adjusting circuit, and sends thecurrent value detected to the second controller.

In step S32, the second controller calculates a difference between thecurrent value detected and a current value specified by the currentadjusting instruction, and sends a calibration instruction to theadjusting circuit if an absolute value of the difference calculated isgreater than a difference threshold.

In step S33, the adjusting circuit calibrates the power signal accordingto a current difference specified by the calibration instruction, andoutputs a calibrated power signal. The current value of the calibratedpower signal is equal to the current value specified by the currentadjusting instruction.

In this embodiment, the adjusting circuit includes a current detectioncircuit, and the current value of the power signal outputted by theadjusting circuit (i.e., the current value of the power signal outputtedfrom the charging adapter) is detected by the current detection circuitin real time. In at least one embodiment, the current detection circuitincludes a current detecting resistor. The current detecting resistordetects the current value of the power signal outputted by the adjustingcircuit in real time and converts the current value into a voltagevalue, and then sends the voltage value to the second controller, suchthat the second controller determines the detected current value of thepower signal outputted by the adjusting circuit according to the voltagevalue received and the resistance value of the current detectingresistor.

Then, the second controller calculates a difference between the currentvalue detected and the current value specified by the current adjustinginstruction, and calculates an absolute value of the difference,determines whether the absolute value is greater than a differencethreshold, and feeds back a calibration instruction to the adjustingcircuit if the absolute value is greater than the difference threshold,such that the adjusting circuit adjusts the current value of the powersignal outputted in time according to the calibration instruction. Itshould be noted that, the difference threshold can be pre-adjustedaccording to the actual operating circumstance of the adjusting circuit.

Then, if the adjusting circuit receives the calibration instruction, itindicates that the difference between the current value of the powersignal outputted by the adjusting circuit and the current valuespecified by the current adjusting instruction is big, and it isrequired to perform the current adjustment again by the adjustingcircuit. Specifically, the current adjustment is performed according toa current difference specified by the calibration instruction, thusensuring that the current value of the power signal outputted by theadjusting circuit is equal to the current value specified by the currentadjusting instruction.

In a specific embodiment of the present disclosure, the adjustingcircuit further includes a voltage and current adjusting circuit. Thevoltage and current adjusting circuit acquires an original power signalby rectifying and filtering the electric supply. In order to calibratethe power signal outputted by the adjusting circuit according to thecalibration instruction, the adjusting circuit can determine a voltageadjusting instruction according to the calibration instruction and sendsthe voltage adjusting instruction determined to the voltage and currentadjusting circuit, during a voltage adjustment performed on the voltageof the original power signal. The voltage and current adjusting circuitperforms a voltage adjustment according to the voltage adjustinginstruction determined and outputs the power signal after the voltageadjustment. Since the power signal after the voltage adjustment wouldflow through a detecting resistor, the detecting resistor detectswhether the current value of the power signal after the voltageadjustment is equal to the current value specified by the currentadjusting instruction. If the current value of the power signal flowingthrough the detecting resistor (the power signal after the voltageadjustment) is equal to the current value specified by the currentadjusting instruction, the adjusting circuit stops determining thevoltage adjusting instruction according to the calibration instructionreceived, and stops sending the voltage adjusting instruction determinedto the voltage and current adjusting circuit. The voltage and currentadjusting circuit stops performing the voltage adjustment.

In this way, in order to ensure in real time that the current value ofthe power signal outputted by the adjusting circuit is equal to thecurrent value specified by the current adjusting instruction, thedetecting resistor performs a real-time detection. If the current isover-high or too small, the current value is fed back to the secondcontroller. The second controller generates the calibration instructionaccording to the current value fed back, and sends the calibrationinstruction to the adjusting circuit. The adjusting circuit determinesthe voltage adjusting instruction according to the calibrationinstruction and sends the voltage adjusting instruction to the voltageand current adjusting circuit, such that the voltage and currentadjusting circuit performs the voltage adjustment according to thevoltage adjusting instruction and outputs the power signal after thevoltage adjustment. Then, the detecting resistor continues to detectwhether the current value of the power signal after the voltageadjustment is equal to the current value specified by the currentadjusting instruction.

FIG. 3 is a second flow chart showing a charging method provided by anembodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

In another embodiment of the present disclosure, after the adjustingcircuit performs a current adjustment according to the current adjustinginstruction and outputs a power signal after the current adjustment, thecharging method further includes the following steps.

In step S4, the charging adapter sends the power signal to a firstcharging interface of the mobile terminal through a second charginginterface, such that the charging adapter charges the cell of the mobileterminal. A first power line in the first charging interface is coupledto a second power line in the second charging interface. A first groundline in the first charging interface is coupled to a second ground linein the second charging interface. There are P first power lines and Qfirst ground lines in the first charging interface, where P is greaterthan or equal to 2, and Q is greater than or equal to 2.

Specifically, an existing MICRO USB interface (including the MICRO USBplug of the charging adapter and the MICRO USB jack of the mobileterminal) only has one power line and one ground line, such that onlyone charging loop can be formed by the power line and the ground line,and the charging current is typically several hundred mA, and istypically not higher than 3 A.

Therefore, this embodiment provides a first charging interface capableof supporting a large current charging (charging current which is 3 A orhigher than 3 A). Since the first charging interface has at least twofirst power lines and at least two first ground lines, the mobileterminal can support a charging with large current through the firstcharging interface.

In addition, if the charging adapter insertion-connected to the firstcharging interface is an existing charging adapter (such as a chargingadapter using the MICRO USB interface to charge), a conventionalcharging still can be performed (by insertion-connecting the power lineand ground line contained in the MICRO USB interface with one firstpower line and one first ground line in the first charging interfacerespectively), i.e., the cell is charged by only using the power lineand the ground line.

In at least one embodiment, there are P second power lines and Q secondground lines.

The P first power lines in the first charging interface are coupled tothe P second power lines in the second charging interface respectively.The Q first ground lines in the first charging interface are coupled tothe Q second ground lines in the second charging interface respectively.

In this embodiment, after the first charging interface isinsertion-connected to the second charging interface, at least twocharging loops (the number of charging loops is the minimum of P and Q)can be formed. Then, the insertion-connected first charging interfaceand second charging interface can support a charging with large current(a charging current which is 3 A or higher than 3 A). Then, the chargingadapter can output a power signal with large current (such as a powersignal of 4 A) when the voltage value of the cell is small (for example,the voltage value of the cell is lower than 4.3V), so as to charge thecell of the mobile terminal with large current.

In at least one embodiment, each of the power line and the ground lineof the existing MICRO USB interface is made of metal copper foil withconductivity less than 20%. However, each of the first power lines andthe first ground lines included in the first charging interface, and thesecond power lines and the second ground lines included in the secondcharging interface provided in this embodiment is made of phosphorbronze C7025 with conductivity reaching 50%, such that the chargingcurrent can be further increased in the case that the cell of mobileterminal is charged using at least two charging loops (including atleast two first power lines, at least two first ground lines, at leasttwo second power lines and at least two second ground lines). In atleast one embodiment, each of the first power lines and the first groundlines included in the first charging interface, and the second powerlines and the second ground lines included in the second charginginterface is made of chromium bronze C18400 with conductivity reaching70%, which can further increase the charging current.

In another embodiment of the present disclosure, the cell detectioncircuit includes a cell connector and a first controller. The step ofacquiring by the cell detection circuit the voltage value of the celland sending the voltage value of the cell to the second controller isspecifically performed in such a way that the first controller acquiresthe voltage value of the cell through the cell connector and sends thevoltage value of the cell to the second controller.

In this embodiment, the mobile terminal not only has a third controllerconfigured to process application programs (the third controller can bepreset in the mobile terminal), but also has a first controller. Withthe first controller, charging the cell of the mobile terminal can becontrolled.

In addition, the cell connector acquires the voltage value of the cellin real time, and sends the voltage value of the cell to the firstcontroller.

In another embodiment of the present disclosure, after the MICRO USBinterface existed in the existing charging adapter isinsertion-connected to the first charging interface of the mobileterminal, the charging is performed by the charging circuit existed inthe mobile terminal. On the basis of the charging circuit existed in themobile terminal, the mobile terminal of this embodiment is furtherprovided with a switch circuit, such that when the second charginginterface is insertion-connected to the first charging interface, notonly the charging can be performed by the charging circuit existed inthe mobile terminal, but also the switch circuit can be controlled toturn on by the first controller. Thus, when the charging adapter chargesthe cell with the existing charging current, the cell can be alsocharged through the switch circuit which is turned on.

The cell connector is further configured to generate an anode contactsignal when detecting whether an anode of the cell is contacted, togenerate a cathode contact signal when detecting whether a cathode ofthe cell is contacted, to generate a temperature signal when detecting atemperature of the cell, and to send the anode contact signal, thecathode contact signal and the temperature signal to the firstcontroller. The first controller forwards the anode contact signal, thecathode contact signal and the temperature signal to the thirdcontroller.

Then, the third controller determines according to the anode contactsignal whether the anode charging contact of the charging circuit of themobile terminal and the switch circuit well contacts to the anode of thecell, determines according to the cathode contact signal whether thecathode charging contact of the charging circuit of the mobile terminaland the switch circuit well contacts to the cathode of the cell, anddetermines according to the temperature signal whether the temperatureof the cell exceeds a temperature threshold.

Then, the third controller is configured to send a disconnectinstruction to the first controller if it is determined according to theanode contact signal that the anode charging contact does not wellcontact to the anode of the cell, or it is determined according to thecathode contact signal that the cathode charging contact does not wellcontact to the cathode of the cell, or it is determined according to thetemperature signal that the temperature of the cell exceeds atemperature threshold, such that the first controller sends a firstdisconnect instruction to the switch circuit, and then the switchcircuit is turned off, such that the charging adapter stops charging thecell through the switch circuit.

FIG. 4 is a first block diagram showing a charging system provided by anembodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

It should be noted that, the charging system provided by embodiments ofthe present disclosure and the charging method provided by embodimentsof the present disclosure are adaptable to each other.

The charging system provided by an embodiment of the present disclosureincludes: a charging adapter 2 including a second controller 21 and anadjusting circuit 22, and a mobile terminal 1 including a cell detectioncircuit 11 and a cell.

The cell detection circuit 11 is configured to acquire a voltage valueof the cell, and to send the voltage value of the cell to the secondcontroller 21.

The second controller 21 is configured to search a threshold range tablefor a current adjusting instruction matched with a threshold rangecontaining the voltage value of the cell, and to send the currentadjusting instruction to the adjusting circuit 22. The threshold rangetable records one or more threshold ranges and current adjustinginstructions having a mapping relation with the one or more thresholdranges. In at least one embodiment, the threshold range table recordsone or more current adjusting instructions, and the one or more currentadjusting instructions have a one-to-one mapping relation with the oneor more threshold ranges.

The adjusting circuit 22 is configured to perform a current adjustmentaccording to the current adjusting instruction, and to output a powersignal after the current adjustment.

FIG. 5 is a second block diagram showing a charging system provided byan embodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

In another embodiment of the present disclosure, the adjusting circuit22 includes a current detection circuit 221.

The current detection circuit 221 is configured to detect a currentvalue of the power signal outputted by the adjusting circuit 22, and tosend the current value detected to the second controller 21.

The second controller 21 is further configured to calculate a differencebetween the current value detected and a current value specified by thecurrent adjusting instruction, and to send a calibration instruction tothe adjusting circuit 22 if an absolute value of the differencecalculated is greater than a difference threshold.

The adjusting circuit 22 is further configured to calibrate the powersignal according to a current difference specified by the calibrationinstruction, and to output a calibrated power signal. A current value ofthe calibrated power signal is equal to the current value specified bythe current adjusting instruction.

FIG. 6 is a third block diagram showing a charging system provided by anembodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

In another embodiment of the present disclosure, the charging adapter 2further includes a second charging interface 23, and the mobile terminal1 further includes a first charging interface 12.

The charging adapter 2 is further configured to send the power signal tothe first charging interface 12 through the second charging interface23, such that the charging adapter 2 charges the cell of the mobileterminal 1. A first power line in the first charging interface 12 iscoupled to a second power line in the second charging interface 23, afirst ground line in the first charging interface 12 is coupled to asecond ground line in the second charging interface 23. There are Pfirst power lines and Q first ground lines, where P is greater than orequal to 2 and Q is greater than or equal to 2.

In another embodiment of the present disclosure, there are P secondpower lines and Q second ground lines.

The P first power lines in the first charging interface 12 are connectedrespectively with the P second power lines in the second charginginterface 23, the Q first ground lines in the first charging interface12 are connected respectively with the Q second ground lines in thesecond charging interface 23.

FIG. 7 is a fourth block diagram showing a charging system provided byan embodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

In another embodiment of the present disclosure, the cell detectioncircuit 11 includes a cell connector 112 and a first controller 111.

The first controller 111 is configured to acquire the voltage value ofthe cell through the cell connector 112, and send the voltage value ofthe cell to the second controller 21.

FIG. 8 is a fifth block diagram showing a charging system provided by anembodiment of the present disclosure. For illustration purposes, onlyparts related to embodiments of the present disclosure are shown, whichwill be described in detail in the following.

In another embodiment of the present disclosure, the mobile terminalfurther includes a third controller 13.

The cell connector 112 is configured to generate an anode contact signalwhen detecting whether an anode of the cell is contacted, to generate acathode contact signal when detecting whether a cathode of the cell iscontacted, to generate a temperature signal when detecting a temperatureof the cell, and to send the anode contact signal, the cathode contactsignal and the temperature signal to the first controller 111.

The first controller 111 is configured to forward the anode contactsignal, the cathode contact signal and the temperature signal to thethird controller 113.

The third controller 113 is configured to determine according to theanode contact signal whether an anode charging contact of the mobileterminal and the switch circuit well contacts to the anode of the cell,to determine according to the cathode contact signal whether a cathodecharging contact of the mobile terminal and the switch circuit wellcontacts to the cathode of the cell, to determine according to thetemperature signal whether the temperature of the cell exceeds atemperature threshold, and to send a disconnect instruction to the firstcontroller 111 if it is determined according to the anode contact signalthat the anode charging contact does not well contact to the anode ofthe cell, or it is determined according to the cathode contact signalthat the cathode charging contact does not well contact to the cathodeof the cell, or it is determined according to the temperature signalthat the temperature of the cell exceeds a temperature threshold.

The first controller 111 is further configured to turn off the switchcircuit according to the first disconnect instruction, such that thecharging adapter 2 stops charging the cell through the switch circuit.

The forgoing description is only directed to preferred embodiments ofthe present disclosure, but not used to limit the present disclosure.All modifications, equivalents, variants and improvements made withinthe spirit and principle of the present disclosure shall fall within theprotection scope of the present disclosure.

What is claimed is:
 1. A charging method, applied in a charging adapter,the charging adapter comprising a second controller and an adjustingcircuit, the adjusting circuit comprising a current detection circuit,wherein the charging method comprises: with the second controller,receiving a voltage value of a cell, searching a threshold range tableto obtain a current adjusting instruction matched with a threshold rangecontaining the voltage value of the cell, and sending the currentadjusting instruction to the adjusting circuit, the threshold rangetable recording one or more threshold ranges and one or more currentadjusting instructions having a one-to-one mapping relation with the oneor more threshold ranges; with the current detection circuit, detectinga current value of a power signal outputted by the adjusting circuit,and sending the current value detected to the second controller; withthe second controller, calculating a difference between the currentvalue detected and a current value specified by the current adjustinginstruction, and sending a calibration instruction to the adjustingcircuit when an absolute value of the difference calculated is greaterthan a difference threshold; and with the adjusting circuit, calibratingthe power signal according to a current difference specified by thecalibration instruction, and outputting a calibrated power signal,wherein a current value of the calibrated power signal is equal to thecurrent value specified by the current adjusting instruction.
 2. Thecharging method according to claim 1, further comprising: sending thecalibrated power signal to a first charging interface of a mobileterminal having the cell by the charging adapter through a secondcharging interface; wherein at least two first power lines in the firstcharging interface are coupled to at least two second power lines in thesecond charging interface, and at least two first ground lines in thefirst charging interface are coupled to at least two second ground linesin the second charging interface, to form at least two charging loops.3. The charging method according to claim 1, wherein the threshold rangetable is stored in the second controller in advance and is presetaccording to a corresponding control requirement to be performed basedon charging time and charging current required for charging the cell. 4.The charging method according to claim 1, wherein the current detectioncircuit comprises a current detecting resistor; and the charging methodfurther comprises: with the current detecting resistor, converting thecurrent value of the power signal outputted by the adjusting circuitinto a voltage value of the power signal and sending the voltage valueof the power signal to the second controller; with the secondcontroller, receiving the voltage value of the power signal, anddetermining the current value of the power signal outputted by theadjusting circuit according to the voltage value of the power signal anda resistance value of the current detecting resistor.
 5. The chargingmethod according to claim 1, wherein the adjusting circuit furthercomprises a voltage and current adjusting circuit; and the chargingmethod further comprises: with the adjusting circuit, generating avoltage adjustment instruction according to the calibration instruction;and with the voltage and current adjusting circuit, performing a voltageadjustment according to the voltage adjustment instruction andoutputting a power signal after the voltage adjustment.
 6. The chargingmethod according to claim 5, wherein the adjusting circuit furthercomprises a detecting resistor, and the charging method furthercomprises: with the detecting resistor, detecting whether the currentvalue of the power signal after the voltage adjustment is equal to thecurrent value specified by the current adjusting instruction; with theadjusting circuit, stopping generating the voltage adjustmentinstruction according to the calibration instruction when the currentvalue of the power signal after the voltage adjustment is equal to thecurrent value specified by the current adjusting instruction.
 7. Acharging adapter, comprising a second controller and an adjustingcircuit, wherein, the second controller is configured to receive avoltage value of a cell, search a threshold range table to obtain acurrent adjusting instruction matched with a threshold range containingthe voltage value of the cell, and send the current adjustinginstruction to the adjusting circuit, the threshold range tablerecording one or more threshold ranges and one or more current adjustinginstructions having a one-to-one mapping relation with the one or morethreshold ranges; wherein the adjusting circuit comprises a currentdetection circuit; the current detection circuit is configured to detecta current value of a power signal outputted by the adjusting circuit,and send the current value detected to the second controller; the secondcontroller is further configured to calculate a difference between thecurrent value detected and a current value specified by the currentadjusting instruction, and send a calibration instruction to theadjusting circuit when an absolute value of the difference calculated isgreater than a difference threshold; and the adjusting circuit isconfigured to calibrate the power signal according to a currentdifference specified by the calibration instruction, and output acalibrated power signal, wherein a current value of the calibrated powersignal is equal to the current value specified by the current adjustinginstruction.
 8. The charging adapter according to claim 7, wherein thecharging adapter is configured to send the calibrated power signal to afirst charging interface of a mobile terminal having the cell through asecond charging interface; and at least two first power lines in thefirst charging interface are coupled to at least two second power linesin the second charging interface, at least two first ground lines in thefirst charging interface are coupled to at least two second ground linesin the second charging interface to form at least two charging loops. 9.The charging adapter according to claim 7, wherein the threshold rangetable is stored in the second controller in advance and is presetaccording to a corresponding control requirement to be performed basedon charging time and charging current required for charging the cell.10. The charging adapter according to claim 7, wherein the currentdetection circuit comprises a current detecting resistor to convert thecurrent value of the power signal outputted by the adjusting circuitinto a voltage value of the power signal and send the voltage value ofthe power signal to the second controller; and the second controller isconfigured to receive the voltage value of the power signal, anddetermine the current value of the power signal outputted by theadjusting circuit according to the voltage value of the power signal anda resistance value of the current detecting resistor.
 11. The chargingadapter according to claim 7, wherein the adjusting circuit furthercomprises a voltage and current adjusting circuit; the adjusting circuitis configured to generate a voltage adjustment instruction according tothe calibration instruction; and the voltage and current circuit isconfigured to perform a voltage adjustment according to the voltageadjustment instruction and output a power signal after the voltageadjustment.
 12. The charging adapter according to claim 11, wherein theadjusting circuit further comprises a detecting resistor, the detectingresistor is configured to detect whether the current value of the powersignal after the voltage adjustment is equal to the current valuespecified by the current adjusting instruction; and the adjustingcircuit is configured to stop generating the voltage adjustinginstruction according to the calibration instruction when the currentvalue of the power signal after the voltage adjustment is equal to thecurrent value specified by the current adjusting instruction.
 13. Acharging system, comprising a charging adapter and a mobile terminal,wherein, the charging adapter comprises a second controller and anadjusting circuit, the mobile terminal comprises a cell detectioncircuit and a cell; the cell detection circuit is configured to acquirea voltage value of the cell, and to send the voltage value of the cellto the second controller; the second controller is configured to searcha threshold range table for a current adjusting instruction matched witha threshold range containing the voltage value of the cell, and to sendthe current adjusting instruction to the adjusting circuit, wherein thethreshold range table records one or more threshold ranges and currentadjusting instructions having a mapping relation with the one or morethreshold ranges; and the adjusting circuit comprises a currentdetection circuit; and the current detection circuit is configured todetect a current value of a power signal outputted by the adjustingcircuit, and to send the current value detected to the secondcontroller; the second controller is further configured to calculate adifference between the current value detected and a current valuespecified by the current adjusting instruction, and to send acalibration instruction to the adjusting circuit if an absolute value ofthe difference calculated is greater than a difference threshold; theadjusting circuit is further configured to calibrate the power signalaccording to a current difference specified by the calibrationinstruction, and to output a calibrated power signal, wherein a currentvalue of the calibrated power signal is equal to the current valuespecified by the current adjusting instruction.
 14. The charging systemaccording to claim 13, wherein the mobile terminal further comprises afirst charging interface, and the charging adapter further comprises asecond charging interface; the charging adapter is further configured tosend the power signal to the first charging interface through the secondcharging interface, such that the charging adapter charges the cell ofthe mobile terminal, wherein at least two first power lines in the firstcharging interface are coupled to at least two second power lines in thesecond charging interface, at least two first ground lines in the firstcharging interface are coupled to at least two second ground lines inthe second charging interface to form at least two charging loops. 15.The charging system according to claim 14, wherein, the cell detectioncircuit comprises a cell connector and a first controller, the firstcontroller is configured to acquire the voltage value of the cellthrough the cell connector, and send the voltage value of the cell tothe second controller.
 16. The charging system according to claim 15,wherein the mobile terminal further comprises a switch circuit, thefirst controller is configured to turn the switch circuit on when thesecond charging interface is connected to the first charging interface,such that the charging adapter starts charging the cell through theswitch circuit.
 17. The charging system according to claim 16, whereinthe cell connector is configured to generate an anode contact signalwhen detecting that an anode of the cell is contacted, to generate acathode contact signal when detecting that a cathode of the cell iscontacted, to generate a temperature signal when detecting a temperatureof the cell, and to send the anode contact signal, the cathode contactsignal and the temperature signal to the first controller.
 18. Thecharging system according to claim 17, wherein the mobile terminalfurther comprises a third controller; the first controller is configuredto forward the anode contact signal, the cathode contact signal and thetemperature signal to the third controller; and the third controller isconfigured to determine whether anode charging contacts of a chargingcircuit of the mobile terminal and the switch circuit are in contactwith the anode of the cell according to the anode contact signal,determine whether cathode charging contacts of the charging circuit ofthe mobile terminal and the switch circuit are in contact with thecathode of the cell according to the cathode contact signal, anddetermine whether temperature of the cell exceeds a temperaturethreshold according to the temperature signal; the third controller isfurther configured to send a first disconnect instruction to the firstcontroller when it is determined that the anode charging contacts arenot in contact with the anode of the cell according to the anode contactsignal, or it is determined that the cathode charging contacts are notin contact with the cathode of the cell according to the cathode contactsignal, or it is determined that the temperature of the cell exceeds atemperature threshold according to the temperature signal, and the firstcontroller is configured to receive the first disconnect instruction andsend a second disconnect instruction to the switch circuit, such thatthe switch circuit is turned off and the charging adapter stops chargingthe cell through the switch circuit.
 19. The charging system accordingto claim 13, wherein the current detection circuit comprises a currentdetecting resistor; the current detecting resistor is configured toconvert the current value of the power signal outputted by the adjustingcircuit into a voltage value of the power signal and send the voltagevalue of the power signal to the second controller; the secondcontroller is configured to receive the voltage value of the powersignal, and determine the current value of the power signal outputted bythe adjusting circuit according to the voltage value of the power signaland a resistance value of the current detecting resistor.
 20. Thecharging system according to claim 13, wherein the adjusting circuitfurther comprises a voltage and current adjusting circuit; the adjustingcircuit is configured to determine a voltage adjustment instructionaccording to the calibration instruction; and the voltage and currentadjusting circuit is configured to perform a voltage adjustmentaccording to the voltage adjustment instruction and output a powersignal after the voltage adjustment.